fix luarocks to v5

Author: chensunny

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
   luacheck:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: leafo/gh-actions-lua@v8
       with:
         luaVersion: "luajit-openresty"
@@ -32,7 +32,7 @@ jobs:
       options: --init
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Install deps
       run: |
         apk add --no-cache curl perl bash wget git perl-dev libarchive-tools nodejs
@@ -54,11 +54,11 @@ jobs:
 
     - name: Install Luacov
       run: |
+        # Clear luarocks cache to avoid manifest corruption
+        rm -rf ~/.cache/luarocks || true
         /usr/local/openresty/luajit/bin/luarocks install luacov
         /usr/local/openresty/luajit/bin/luarocks install lua-resty-openssl
 
-    - uses: actions/checkout@v2
-
     - name: Run tests
       run: make coverage